Rate identification in multirate CDMA

Code division multiple access (CDMA) is a multiplexing technique that spreads the spectrum of user data so that it occupies a bandwidth much greater than that is necessary to send the information. CDMA systems have been highly successful due to the huge increase in capacity offered compared to other technologies. An effective technique to further increase the capacity of time-varying wireless channels is the employment of adaptive rate transmissions. Here, the transmission rate, bandwidth and power can be adaptively adjusted depending upon the instantaneous channel conditions. In this project, we analyzed the rate identification technique in such multirate systems. We saw how the concept of using the same PN sequence can significantly simplify the system.